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Higher volume of ventral striatum and right prefrontal cortex in pathological gambling

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Abstract

Functional neuroimaging studies have implicated an involvement of the prefrontal cortex and mesolimbic reward system (i.e., ventral striatum) in pathological gambling (PG). However, there is a lack of studies focusing on structural changes in frontostriatal brain regions in adult subjects with PG. In order to study differences in local grey matter volume, 20 male subjects with PG and 21 matched controls underwent structural magnetic resonance imaging. Structural brain data were analysed via voxel-based morphometry with a focus on prefrontal areas and ventral striatum. By comparing grey matter volumes in brain regions highly relevant for brain functional changes in PG, the present study found a higher volume in right ventral striatum and right prefrontal cortex by means of voxel-wise morphometry in PG subjects as compared to controls. Our findings demonstrate local grey matter changes in brain areas that have previously been associated with functional changes in PG. Hypertrophy in the prefrontal cortex might be an adaptation at least partly induced by the higher grey matter volume in the ventral striatum and may help to increase cognitive control over gambling impulses. Future research should explore the relationship between functional and structural alterations as well as the course of changes in PG.

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Acknowledgments

We thank all subjects for participation. The study was funded by “Senatsverwaltung für Gesundheit, Umwelt und Verbraucherschutz, Berlin” and Deutsche Forschungsgemeinschaft (DFG), graduate school 86 “Berlin School of Mind and Brain” (S.K.).

Conflict of interest

Professor Heinz has received research funding from the German Research Foundation (Deutsche Forschungsgemeinschaft; HE 2597/4-3; 7-3; 13-1;14-1;15-1; Excellence Cluster Exc 257 & STE 1430/2-1) and the German Federal Ministry of Education and Research (01GQ0411; 01QG87164; NGFN Plus 01 GS 08152 and 01 GS 08 159). He received unrestricted research grants from Eli Lilly & Company, Janssen-Cilag, and Bristol-Myers Squibb. All other authors declare no conflict of interest.

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Correspondence to Saskia Koehler.

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Koehler, S., Hasselmann, E., Wüstenberg, T. et al. Higher volume of ventral striatum and right prefrontal cortex in pathological gambling. Brain Struct Funct 220, 469–477 (2015). https://doi.org/10.1007/s00429-013-0668-6

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  • DOI: https://doi.org/10.1007/s00429-013-0668-6

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